New Mexico State University College of Engineering Professor Tom Jenkins is developing tools to show New Mexico's farmers and ranchers how they can use one of our state's most plentiful resources, the sun, to access one of the most scarce, water.

In New Mexico, wells can range from 10 to 1,000 feet in depth.

"When you are 20 miles from the nearest electrical outlet, that makes things a little difficult," said Tom Jenkins, professor of engineering technology and head of the department's renewable energy program.

"Solar power is a great option because it's so available in New Mexico where the sun shines nearly every day of the year. Wind is not as reliable, depending on location, and geothermal and hydroelectric sources are less viable options."

Jenkins has developed a computerized tool, the Solar Water Pumping Design Specification Spreadsheet, which can help farmers and ranchers with the basic process of designing a solar water pumping system that will help them determine feasibility and make implementation decisions.

Users can enter information about the depth of their well, its location, if it will be used for watering livestock, how many and what type of livestock, other daily water requirements, etc. The spreadsheet will recommend the volume of water needed and how much storage will be needed as reserve for cloudy days. The system will recommend a hardware layout for the given application, how many panels will be needed, pump and pipe size. The spreadsheet, available in both English and Spanish, also has an economic component that will help estimate how much a system might cost.

The ability to enter different values into the spreadsheet allows users the opportunity to investigate different scenarios before making final decisions on solar-powered water pumping system designs.

The project arose after Jenkins attended a presentation by the Cooperative Extension Service, which surveyed its agents serving the state's 33 counties about what kind of engineering assistance is needed by Extension clientele. The response was alternative sources of energy technology that would help them address the challenges associated with the availability of water.

The spreadsheet and associated documentation can be found at

Initially, Jenkins, along with fellow engineering technology professor Kenny Stevens, partnered with the College of Agricultural, Consumer and Environmental Sciences to create a series of short videos that promote renewable energy. The videos can be viewed at

Then, in the spring 2011 semester, Jenkins presented his ideas to engineering technology seniors as possible projects for their senior capstone design courses--the culmination of the engineering curriculum at NMSU, requiring students to utilize knowledge and skills acquired throughout their coursework.

Lloyd Vigil and Christian Garces took on the Solar Water Pumping Design Specification Spreadsheet as their senior capstone project in the spring 2011 semester.